How many 3 digits number are divisible by 7


Asked by admin @ in Math viewed by 338 People


How many 3 digit numbers are divisible by 7

Answered by admin @



Numbers begin from 105 .......994

here a= 105
l= 994
n=?
d= 7
so
994 = 105+(n-1) 7
= 105+7n-7
994= 98+7n
994-98 = 7n
896/7 = n
n= 128
so 128 three digit numbers are divisible by 7
I guess......

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